If you run 2.5 miles in 20 minutes your average speed is 7.5 miles per hour.
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Traveling 117 miles in 2 hours and 15 minutes means the average speed is 52 miles per hour. (Divide 117 by 2.25)
Average speed = Distance/Time = 2.5 miles/15 minutes = 10 miles per hour
40 miles.
Jenna's average speed was 8 miles per hour.
40mph